Traits

[Potion item]: Magic Eclair

A neck that is extended up to one and a half times as long as the leech's own body. 

Leeches with this neck tend to be slender and notably more delicate. Because the length is so unstable, they often have to lie down when feeding to reduce risk of injury.
Necks that are twice as long as the body will almost always result in fatality due to blood being unable to reach the brain, and breeders frequently question how humane the trait is at all.